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Some research also suggests that if you become vitamin B12 deficient, it can increase your risk of age-related macular degeneration (AMD), which is a gradual type of vision loss common in people over 50
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Sepesi B, Ye Y, Mitchell KG, Zhang L, Gu J, Ji L, Antonoff MB, Hofstetter WL, Rice DC, Mehran RJ, Walsh GL, Vaporciyan AA, Swisher SG , Roth JA, Wu X
Amin S, Mallick AA, Edwards H, Cortina-Borja M, Laugharne M, Likeman M, et al
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Below pH 5.0, copper ions detach, leading to a total loss of efficacy
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